txtDefinition=A family of {\uldb instruments}{\v 84565} constructed from brass and other metals, whose {\uldb tone}{\v 100650} is initiated by vibrations of the player\'92s lips within a cupped mouthpiece. The primary brass instruments in Mozart\'92s lifetime were French horn and trumpet, and their usage was restricted largely to {\uldb harmonic}{\v 84040} support within {\uldb orchestral}{\v 134419} music. (Mozart wrote several horn concertos and used the horn occasionally in {\uldb chamber music}{\v 76679}.)
